Metallic car door



June 10, 1930. s, BIARROWS 1,762,151

, METALLIC CAR DOOR Filed March 20, 1926 2 Sheet-Sheet 1 25911, 2 13 25 42 o o o o o o o d o o 0 o o o o V June 10, 1930. A, s, B RROW S 1,762,151

METALLIC CAR DOOR Filed March 20, 1926 2 Sheets-Sheet 2 Patented June 10, 1933 sta rs stares gear-ear oFF cE ALLAN s. BARROWS, or Los ANGELES, cALiroRNIA, Assiornon' TO THE YOUNGSTOWN! STEEL noon COMPANY, or CLEVELAND, OHIG, A CORPORATION oFoHIo METALLIC can 13003 Application filed'March 20, 1926. -Serial No. 96,166.

This invention relates to improvements in metallic car doors. i

An object of the invention is to provide an'all metal door, especially adapted for side doors of railway carsfalthough its application is not necessarily limited thereto, and in whichthere is employed a minimum amount of material consistent with the necessary strength, which material is-concentra-ted at those points where the greatest stresses and strains are imposed. The invention also contemplates such a metal door composed mainly of sheet metal, reinforced along the edges 7 thereof and inwardly of said edges. 7 Another and more specific object of the invention is to provide a metal door of the character indicated made up of a plurality of metallic panels provided with fabricated reinforcements of a novel character, which may include offset portions such as corrugations or the like formedin the sheet metal of which the door is composed'and extending to one side of the main plane of the door' in conjunction with reinforcing rolled sections of various angular formatlons disposed at the inner face of said door'and extendinginto said ofiset portions for bracing the same and the door structure generally, additional means being provided on the under: face of 39 said door in positionv to extend" over: the reinforcing elements and the mouths of the oii' sets so as to provide a hollow tubular formation in which the reinforcing element in each case operates as 'abrace or st-rut for the sheet metal forming the corrugation as well as for the door generally, the reinforcing elements being concealed from view, protected from the weather, and removed from the:

front face of the door, whereby the front face of-the door is smooth and free of ob-. structions which occur in ordinary sheetmetal doors, which collect moisture and other foreign matter, resulting in. rapid deterioration and'loss in efficiency.

I Another object of the inventloni'suto provide an edge construction at the rearportion of the door, wherein a rolled section, 1s secured to the main body portion andis provided with an inwardlyturned extension disposed to operate as a spark seal.

another slightly different embodiment of the vention, Fi ure 17is a fra mentar horifl b b I 7 Other and further objects of the invention will more clearly appear fromthe descrip-, -t1on and claims hereinafter following.

In the drawings forming a part of this specification, F lgure 1 1s a front elevational-w view of a car door made up in accordance with my invention.v Figure 2 is. a Vertical, sectlonal view of the door on the line 22 of Figure 1. Figure 3 is ahoriz ontal, sectional view of the door construction on the embodiment of the invention, Figure 7 is 1 a fragmentary, vertical section of the bottom part of the door illustrated in Figure .6. Figure 8 is a fragmentary, horizontal, sectional VlGW-Of the rear part of a door showing still invention. Figure 9 is afragmentary, horizontal, sectional view of the rear part of a 7 door showing still another embodiment of the iIlVGIllJiOl1. Figure 10 is a fragmentary, hor

zontal, sectional View of the rear part of ,a-=8

door showing still another embodiment of the invention. Figure 11 is a fragmentary, horizontal sectional view of the rear part of a door showing still another embodiment of I the invention. Figure .12 is a fragmentary,i*8

horizontal sectional view of the rear part ,of

a door showing still another modification of the invention. Figure 13. is a fragmentary vertical "sectional --view of, the bottom part 1 of a door of the character illustrated in Fig-" l re-'12; Figure 14' is a fragmentary, hori zontal sectional view ofthe rear part of a door showing stillanother .embodiment of theinvention. Figure'l5 is a fragmentary, vertical sectional view ofthe bottom part of adoorofthe character illustrated in Figure 14. Figure '16is a fragmentary, horizontal sectional view of the rear part of a door showing still another modification of the in zontal sectional view of the rear part of a door showing still another modification of the invention. Figure 18 is a horizontal sectional view of the rear part of a door showing still another embodiment of the invention. Figures 19 and 20 are fragmentary, horizontal sectional views of the rear parts of doors showing still other embodiments of thevinvention. And Figures 21 and 22 are fragmentary, vertical sectional views of different embodiments of reinforced connections between the horizontal meeting edges of the door panels.

Referring first to Figures 1 to 3 inclusive, the invention contemplates the provision of a metallic door of the usual rectangular form, and which comprises a main body portion made up of a plurality of metallic panels 10, 11, and 12, said panels having their adjacent horizontaledges overlapped and rigidly connected by welding or by rivets as indicated at 13. Each of the panels is made of relatively thin sheet metal, and in order to reduce this thickness to a minimum consistent with the necessary strength, each panel is provided with strengthening indentations, embossments, or corrugations, in this instance being shown as horizontally disposed corrugations, indicated at 14, though in certain instances in conjunction with the reinforced edge construction of the door, as hereinafter described, it might be desirable to employ other means of bracing the portions of the panels inwardly of the edge construction by various expedients known in the art.

In providing a reinforced edge construc tion for the main body portion of the door comprising the fabricated panels 10, 11 and 12, the main body portion is provided with a vertical corrugation 15 adjacent its rear edge, the inwardly disposed wall 16 of the corrugation 15 being of somewhat greater extent than the outwardly disposed wall 17 of said corrugation, the main body portion .outwardly of the corrugation 15 extending outwardly of the corrugation to provide a marginal section 18, which by reason of the less extent of the wall 17 of the corrugation is offset outwardly somewhat from the main plane of the door to permit eificient application of reinforcing elements hereinafter described. The forward edge of the door is also provided with a vertically disposed corrugation 19, similar to the corrugation 15 having a wall 20 of greater extent than the wall 21, the main body portion of the door outwardly .of the corrugation having a marginal section 22 offset in the same manner as the marginal section 18. Ad acent the top edge of the door the uppermost horizontal corrugation 23 is formed in the same manner as the corrugations 15 and 19, having a wall 24: of greater extent than the wall 25, the main body portion of the door extending outwardly of the corrugation23 to provide the marginal section 26, which by reason of the less extent of the outer wall 25 is offset in the same manner as the marginal portions 18 and 22. The lowermost horizontal corrugation 27 is formed in the same manner as the front, rear and top corrugations, having an inner wall 28 of greater extent than the outer wall 29, the main sheet outwardly of the corrugation being provided with a marginal section 30 oifset in the same manner as marginal sections heretofore referred to. it will be noted, as shown, that the vertical corrugations 15 and 19, merge at their ends with the ends of the uppermost and lowermost corrugations 23 and 27, and the horizontal corrugations between the uppermost and lowermost corrugations preferably merge at their ends with the vertical corrugations 15 and 19.

Means are provided for reinforcing the edge portions of the main body portion, and at the rear of the door, said means take the form of an angular rolled section 31 having an angularly extending portion or flange 32 which is disposed substantially at right angles to the main plane of the door and extends into the corrugation, terminating at its outer end in a bulb formation 33, which abuts the inner bottom wall of the corrugation 15, said member having at its opposite end an angularly turned portion 31 extending outwardly toward the outer edge of the marginal section 18 and lying fiat-wise thereagainst. In

this connection, it should be noted that the less extent of the wall 17 of the corrugation offsets themarginal section18 to such an extent that the angular portion irl is disposed in a plane substantially common with the main plane of the main body portion of the door. It will be noted that the angular portion 32 of the angular member 31 acts as a brace or strut for the edge of the door and for the corrugation. In conjunction with the rolled reinforcing section 31, a reinforcing strip 84 is utilized. The strip 31 has its inner edge portion connected to the main body portion of the door by welding or rivets as indicated at 35, said strip bridging the corrugation and extending outwardly thereof so as to rest against the angular portion 31 of the section 31, as shown, the marginal portion 18, the angular portion 34c and the outer edge portion of the strip 3 1 being rigidly secured to gether by welding or rivets indicated at 36. In the case of the rear edge of the door, I provide a spark strip which, in this'in stance, is in the form of an angle bar 237, having one flange 38 lying against the marginal section 18 and secured in position by the rivets 36, the remaining angular portion oi) oi the angle bar 37 extending inwardly a suitable distance beyond the main plane of the door, and so disposed as to co-operate with means ordinarily provided on car door frame; so as to act as a spark strip.

The forward edge of the door is provided lot) -with-an angular section39 similar to the section 31 arrangedwith respect to the acorrugation19 and marginal portion 22 in identically the same manner as described for the rear construction, a relnforcing strip 40 also being secured to the door and arranged with respect to the angular member 39 and the corrugation in identically the same manner described with reference to the rear edge construction. The upper edge of the door is also provided with an angular reinforcing section 41 arranged with respect to the corrugation 23 and marginal section 26 in the identical manner described with reference to the front and rear edges ofthe door, a reinforcing strip 42 also being provided and arranged in a manner identically similar to that described with reference to the front andrear edges of the a door door also includes'an angular rolled'section I 43 arranged with respect to the corrugation 27 in identically the same manner as described with reference to the other edges ofthe door,

a reinforcing strip 44being provided and ar ranged in the same manner as the reinforc ing strips associated with the otheredges of the door.

Referring to Figures 4 and 5 of the drawmg, fragmentary vlews only are shown'of the rear and bottomedges of the door, but it will be understood that the edge constructions described in connection with Figures 4 and 5may be applied to the top, bottom, front and rear edges of the door, in thesame man-* ner described in connection with Figures lto 3, incluslve, it being deemed unnecessary-1n connection with Figures 4 and 5, and with theot-her modifications hereinafter described,

to illustrate a complete door, since it will be appreciated that the main body portion of, the doormay be similar-to thatshown in Fig ures 1 to 3, and that the'bottom edge 'construction shown'in Figure 5lS duplicated on the forwardand top edges of the door, while, the

rear edge of the door is of a slightly different formation by reason of thefprovision of the spark seal. Referring' to the'reanedgejconstructlon lllustrated 1n Flgure 4, a vertlcal' corrugation is provided having an inner wall 51 of greater extent 'than the outer'wall 52, so as to oflset the marginal'portio'n '53 in" 7 a manner heretofore re]ferredto, Associated" with the corrugat1on:5 0 1s an angle member having one angle -portion.5 4 extending into the corrugation, the outer end of said angular r portionabutting the bottom wall of the corrugation, the inner end of theangular member 54 being provided with anangular portion55 extending outwardly toward therear edge of thedoor, said angular portion in this instance, being provided with an integral inwardly turned angular section 66 extending inwardly of the main plane of the door and disposed to operate as a spark strip, A re inforcing strip 57 is provided, the edge por- The bottom construction of thetions inwardly of the corrugation being securedt'o the main body p'ortion'of the-door by welding or rivets as indicated at 58, said strip bridging the corrugation and lying flat againstthe angular portion 55 of the reinforcingsection, the'marginal portion 53,: the angular section 55 and theouter edge portion of the strip 57 being secured together by welding or riveting as indicated at 59.

, Thebottom construction of the door il lustrated in Figure 5, includes a corrugation 60 similar to the corrugation 50, and a reinforcing strip 61 and an angular member 62,

whichis identical with the angular member 7, described in connection with Figure '4'except that the angularly turned section" 56, j

forming the spark strip, is, of course, omitted. The construction at the top and front edges of the door will be similar to that shown inFigure 5.

Referring to Figures and 7, the construction shown herein is identically thesa'me as that shown in Figures 4 and 5,'the corruga- 7 tion 70, and the strip 71 being identical :to the corrugation 50 and strip 57. In this con struction, the reinforcing section is in the form of anangular member having an angular portion 7 Qextending into the corrugation and having another portion 7 3 extending at right angles thereto the inner angular portions abutting the metal formingthe corrugation. At the opposite end of the angular portion 72 the angularmemberhas an angular section 73 termlnating in an inwardly-extending angular part 75 forming a spark seal, the parts being secured together in the same manner disclosed in Figures '4 and 5.

Figure 7 discloses the identical arrangement disclosed in Figure 6 except that the angularly turned "part 75 on the angular member 74 is omitted, and in this connection, the same reference characters used to designate the parts in Figure 6, designate similar'parts in Figure-7. a i

Referring to the corrugations 50 and marginal section 53. In this construction, an'angular member T 82 is provided, one flange 83 of -which;ex' tends substantially normally to the main 1 I. plane and the main body portion, and the Figure 8, the corrugation and the marginal sect1on, 81 are similar to other flange 84 extends substantially at-right angles thereto outwardly toward the rear edge of the door, In thisconstruction a rebeing curled over the angular port-ion-84andr marginal section 81 as indicated at 88, the

curled portion, the marginal section Slandthe angular portion 84 beingrigidly secured together by rivets 89 or other suitable securing means.

. exception that instead of the separate angle member 37 forming the spark strip, the an gular portlon corresponding to the portlon 34 of the bulb angle is provided with an integral inturned angular section 90, extending inwardly of the main plane of the door to provide a spark seal. The remaining portions of the edge construction comprise the bulb angle member 91, the corrugation 92, and the reinforcing strip 93, which parts correspond to the bulb angle 31, the corrugation 15, and the reinforcing strip 34, respectively, as shown in Figures 1 to 3 and the parts are arranged in an identically similar manner but for the exception above noted. In connection with this figure, it will be appreciated that the top, front and bottom of the door may have one or more of its edges formed of a construction identical with the rear construction described except for the omission seal.

Referring to Figure 10, the main body portion 100 is provided with a vertical corrugation 101, and a marginal portion 102, an angular member 103 being provided, which has an angular portion 104 extending into the corrugation and having its outer end abutting the inner wall of the metal of which the corrugation is formed, the angular memher 103 being provided with right angular flanges 105 and 106, the flange 105 being secured to the main body portion 100 by means welding or rivets as indicated at 108. In connection with this construction, the angular portion provides means spanning the corrugation, and includes an integral flange which extends into the corrugation to brace the The edge construction disclosed in this embodiment of the invention maybe applied to one or all edges of the door as. de-

sired.

Referring to Figure 11, the main body sheet is indicated at 110, said body sheet which fits within the corrugation and rests against the flattened portion 112 of the inner wall thereof, the flange 116 extending inwardly toward the main plane of the door. The angle member 114 is preferably secured in the corrugation by means of welding or rivets as indicated at 117, which connect the flange 115 and the crest of the corrugation. In connection with this arrangement, it will be appreciated that the same may be utilized in connection with one or all edges of a door in the manner heretofore referred to. In the construction shown in Figures 12 and 13, the main body portion is denoted by the reference character 120, said main body portion being provided with a corrugation 121, said corrugation at its crest being provided with an integral hollow rib or smaller corrugation 122, the outer wall portion 123 of the corrugation being of less length than the other wall, and terminating in a marginal section 124. Disposed within the corrugation 121 is an angular reinforcing member 125 including an angular portion 126 extending substantially normal to the main plane of the door, having at one edge an angularly turned portion 12'? which abuts the inner wall of the metal of whicl1 the corrugation 121 is formed, and the angular member 125 is provided with an angular section 128 at its inner end, the outer extremity of which is provided with a turned part 129, extending inwardly of the inner plane of the .door to provide a spark seal. A reinforcing strip 130 is secured to the main body portion 1.20 by welding or rivets as indicated at 121, said strip extending across the corrugation and having its outer end portion 131 secured to the angular portion 128 of the member 125, and to the marginal section 124, by means of welding or rivets as indicated at 132. Figure 13 shows the edge construction as it would appear when applied to an edge of the door other than the rear edge, in this construction, the angular part 129 which forms the spark strip being omitted; consequently, similar reference characters will be utilizedto designate similar parts in Figures 12 and 13.

Referring to Figures 14 and 15, 140 represents the main body portion of the door, provided with a vertical corrugation 141 at the rear edge of the door, which corrugation hasa flattened crest 142, the outer wall 143 of the corrugation being of somewhat less extent than the inner wall thereof, a marginal 141, and that the angular member 145, is provided with an inwardly turned spark strip 148. The construction shown in Figure 15 is that the edge construction disclosed in these figures may be used in connection with one.

or all edges of the door. 7 V y In the construction shown in Figure l6,the main body portion of the door preferably is flat at its edge. In this constructioma separate strip of metal 151 is provided, which is secured to the sheet forming part of the main body portion of the door, and said separate strip of metal 151 has formed therein acorrugation 152, the inner wall 153 of said corrugation being of somewhat greaterextent than the outer wall 154, the portion of the strip outwardly of the corrugation providing a marginal'portion 155. Disposed within the cor- V rugation is one angular portion 156 ofa reinforcing element, the angular portion'156. having its inner end abutting the inner wall of the metal of which the corrugation is formed, extending toward the main plane'of the door substantially at right angles thereto. The reinforcing member is also provided with an angular portion 157 extending toward, the outer edge of the door, said pore tion lying against the marginal portion; 155. An additional reinforcing angular member, preferably in the form of a Z-bar 158 has one flange, 159, overhanging the crest of the corrugation 151, the web of the Z-bar extending.

substantially parallel to the angular portion 156 of the angular member, the remaining flange 160 of the Z-bar lying against the outerface of the marginal portion 1550f the strip. 153 in which the corrugation is formed, the} flange 160, the mar inal portion 155, the an;

7 the main body portion 150 being secured together by welding or f gular part 1157, an

rivets as indicated at 161, the inner edge of the strip 153 being secured to the main body portion 150 by welding or. rivets as indicated at 162. In the construction just described,

it will be appreciated that the strip in which 7 the corrugation is formed provides one ply of material in the edge construction, and the main body portion, 150, provides another ply of material, the corrugation being formed in one ply of material, and the angular reinforcing member being disposed in the corru-' ation between the plies of material and be-' ing secured outwardly of the corrugation between said plies of material; In connection with this construction, it will be appreciated that the same may be utilized in connection with one or all of the edges of the door.

Referring to Figure 17, 170 represents, a

flat body portion of sheet metal, 171' repre:

sents a strip of material extending along the edge of the door, in which is formed a corrugation .172, the outer wall 173 of said corrugation being of less extent than the inner wall, and the portion of the strip outwardly v of the corrugation providing a marginal sec; 1

is an angular member l7 5, having an angular angular flange: 177 abutting the inner wall of themetal forming the corrugation, andalsoprovided with an angular portion 17 8 lying against the marginal section'l'M, the marginal'section 174:, the angular portion 17 8 and the outer end of the'main body portion being secured together bywelding or rivets as 1nd1- cated at 179. The inner edge portion of the strip 171 is secured to the main body portion 3 by welding or rivets as indicatedyat-180. In

it will be appreciated that this construction,

two plies of material are provided, one of" which has a corrugatlon formed therein, in

conjunction with an angular member,;rigid- 1y secured between having angular portionsprojecting into the corrugation. The construction disclosed in connection w1th this figure may be applied Figure l8 shows a construction inwhich the main body portion is designated by the reference, character 190, 'astrip 191 being provided, which strip has formed therein a corrugation, in conjunction with an angular member 19.2,theparts mentioned 1n connection with this construction beingidentical with the parts 150, 151 and 157, as disclosed in Figure 16, the onlyfdiiference'in this construction from that. disclosed in Figure 16 residing; in the. omission, of the Z-bar 158. It will be appreciated thatthe construction disclosed inFigure 18 may be used in connection with one-or all of the edges ofthe. door as desired, L g i Figure 19 shows-a'construction in which the main flat body portion is designated by a reference character 200, said body portion having formed therein a corrugation 201, the material of the body portion inwardly of the corrugation being offset as indicated at 202,

and the material outwardlyfofthe corrugation being extended to provide a marginal section 203, which lies in a plane common with the ofiset portion 202. A reinforcing;

strip 204; is provided which spans the corru-i the plies of material and,

to. one orall of the edges of the door as will-'-v be appreciated.

gation,'-and the inner edge portion of said .7

strip being of .a character to fit within, and lying fiatwise againstthe inner surface of the oflset portion 202,while the outer edge of the strip lies flat against the marginal section 2O3, '-the strip being connected to the body sheet; by rivets 205, which are countersunk on the inner side of the strip 204. By this ar rangement, it will be appreciated that .the inner surface of the strip 204 lies in the same plane as the inner surface of the main body portion.:. I I v with an offset 211, and a corrugation 212,1;116

outer leg 213 of said corrugation being of less extent than the other leg of said corrugation, the shorter leg 213 being provided with a marginal section 214 outwardly of the corrugation. Extending into the corrugation is an angular reinforcing section 215, one flange "of which extends normal to the plane of the main body sheet and the other flange of which is disposed outwardly and rests against the inner surface of themarginal section 214. A reinforcing strip 216 is provided which .spans the corrugation, and has its inner end disposed in the offset 211, and the outer end resting against the under surface of the outwardly turned angular portion of the member 215 thefstrip being riveted to the main body sheet by rivets as indicated at 217 and the marginal sectionythe outturned angular portion of the section 215, and the strip'214 being secured together by rivets as indicated at 218.- By this arrangement, it will be noted that'the strip is disposed in a plane common with the plane of the main body sheet. a

"Figure 21 shows a modified form ofthe connecting means between the meeting edges of the panels forming themain; body portion of the door. In said figure'the panel isshown as being fiat and is indicated by the numeral 220, said panel being provided along its lower edge with an offset 221 similar to 1 the offsets disclosed in Figures 19' and 20 except that the same is deeper, the panel out:

wardly of the offset 221 being provided With a' corrugation 222, and outwardly of said corrugation the panel is further provided with a marginal section 223. Disposed so as to project within the corrugation is an an-f gular member224, one flange of said angular member being disposed substantially at right.

angles to the main plane of the door, and the remaining flange disposed within the offset 221 The adjacent panel with which the panel 220 is connected is indicated by the reference character 225, said panel extending across the corrugation and having its end lying against the vertically disposed'angular portion of the angular member within the offset 221, the metal forming the offset, the angular portion of the member 224, andthe end of the panel 225 being connected by rivets as indicated at 226, and the marginal section 223 of the panel 220 being connected to the panelv225 by rivets as indicated at 227. In this construction the oifset is deeper to provide room for additional plies of material, and in this way aifords a strong, efiicient connection between horizontal meeting edges of the panels forming'the main body portion of the door.

The construction shown in Figure 22 comprises panels 230 and 231 forming part of the main body portion of the door, only so panel 230 is offset as indicated at 231, while the corresponding edge of the other panel is flat. Secured to the oifset portion 231 of the panel 230 is a reinforcing piece of material 232 which has a corrugation 233 formed therein, one leg 234 of said corrugation being shorter than the other, the short leg of the corrugation being provided with a marginal section 235 adapted to lie flatwise against the offset 231,'while the opposite portion of the piece of material is formed in a marginal section 236 which lies against the face of the panel 231 An angular member 237 is provided having one flange projecting into the corrugation 233, and another flange disposed so as to lie against the under surface of the offset 231, the panel 231 spanning the corrugation and lying against the vertically disposed flange of the angular member 237. The piece of material 232 is secured to the panel 231 by rivets as indicated at 238, and the end of the panel 231 the vertically disposed flange of the angular member, the offset 231, and the marginal section 235 of the piece of material 232 are secured together by rivets as indicated at 239. In this construction, it will be noted that the panels 230 and 231 lie in a common plane, While the meeting edges of the panels are securely fastened together by means of a reinforced connecting structure.

In the above described arrangements, it will be appreciated that in each instance a reinforced sheet metal door is provided in which the reinforcing elements are disposed upon the inner face of the door and project into outwardly offset portions formed in the door, whereby the outer face of the door is left smooth and free of reinforcing angular members which, in the ordinary types of metal doors, collect moisture and other foreign matter, causing corrosion and rapid disintegration of the parts of which the door is composed. In addition, the reinforcing elements are concealed from view, thereby providing a door having an attractive appearance.

An important feature of the invention resides in providing a braced corrugation of the character described in which the reinforcing section has 'aportion extending outwardly from the main plane of the door and substantially at right angles thereto, and into abutment with the surface of the bottom wall forming the trough or valley of the corruand effectively prevents such crushing or .denting and additionally stilfens and braces the corrugation longitudinally and braces the door structuregenerally. The bracing function of the. reinforcing section is augmented by the provision of the reinforcing strip which extends across thermouth of the corrugation and is fastened to the metal of spreading,

this way reducing the number of corrugations strength and which are necessary to stiffen the metal and providing a door structure of exceptional durability.

Although the offsets in the sheet metal have been heretofore designated as indentations or corrugations, it will be understood that these terms are intended to cover em- 'bossments, depressions of undulations in the metal of any othercharacter, which reinforce the metal and provide troughs or valleys for ments in the various manners heretofore referred to. I k

It also shouldbe noted that'any of the constructions heretofore "described are capable of use upon one edge, two edges, three edges, or four edges, as desired, and it will be understood that the reinforced edge construction as described maybe utilized in conjunction with reinforced corrugations within the reinforced edge construction or may be utilized with other known means of reinforcing the body portion of the door within the reinforced edges, as by dishing or the like.

While I have herein shown and describe-d what I now consider the preferred manner of carrying out my invention, the same is merely illustrative and I contemplate all changes and modifications that come within the scope of the claims appended hereto.

I claim:

1. A fabricated car door of metal comprising a sheet metal body portion having a strengthening corrugation or indentation,

extending to one side of the main plane of said door; a reinforcing element rigidly associated with said door and provided with a bracing portion disposed in said corrugation and extending at an angle to the main plane of the door toward the innerbottom wall of the trough of said corrugation and termi nating in said corrugation, the metal form- I ing'the inner extremity of said terminal portion being thickened. V

2. A car superstructure member including:

a sheet'metal panel having a corrugation,

therein; and a strut-like, commercial section reinforcing element for and extending lengthwise of the corrugation, said element including two sections at right angles to each other, one of which extends within the corrugation in spaced relation to the ;portions of the corrugation which define the mouth thereof. 1 v

3. As an article of manufacture for a car,

'a sheet metal panel having a corrugation therein; and a strut-like reinforcing element extending lengthwise of the corrugation and having a section projecting within the cor- V rugation and engaging with the interiorwall thereof, adjacent the crest, said section being in spaced relation to the sides of the corrugation at the mouth of the latter and said element having another section secured to the metal panel.

' 4. A fabricated member fora carsuperstructure comprising: a sheet'metal panel having a corrugation therein; a stripJbr1dg-' ing the mouth of the corrugation and secured to the panel sheet at intervals along opposite sides of the corrugation; and a strut-like reinforcing element having a section perpendicular to the plane of the bridging strip and extending from said bridging strip to the crestzone'ofthe corrugation, said element having another section secured to' the panel at one side of the base of the corrugation. I 5. In a car superstructure member, the combination with a sheet metal panel having a corrugation therein; of a strip bridging the mouth ofthe corrugation and secured to the panel at intervals'on opposite sides of the corrugation; anda strut-like metal reinforcing element extending between said bridging stripand the crest zone of'the corrugation and engaging with both said bridging strip and crest zone of the corrugation, said element being in spaced relation with respect to the side portions of'the corrugation adjacent the mouth of the latter. r In witness that I claim the foregoing I have hereunto subscribed my name this 11th day of March, 1926. V

ALLAN S. BARROWS. 

